Tire blow-out patch



Nov. 23 1926.

R. F. REEVE TIRE 1E Low-ouff` PATCH 'fvile'cxnmvI 24 n, INVENToR I ATTORNEY Patented Nov. 23, 1926.

UNITED STATES- ROBERT n. REEVE, or NEWARK, NEW JERSEY.'

TIRE BLOW-OUT PATCH.

Application lcdgDecei/nbcr 24, 1925. Serial No. 77,502.

This invention relates to tire blow-out patches and has as one of its obJeets tol provlde a patch that will confine the gum within its marginal limits andprevent the samt from spreading over the outer surface of the inner tube. l

In practice, 'it has vbeen found that tire blowout patches of this type adhere to the outer surface `ofthe inner tube, due to the s reading or oozingout of the gum fromA ttl e patch, often resulting in destroying the inner tube beyond repair.

One object of the .present invention is to avoid the spreading or oozing out of the gum and to confine the same within the limits of the patch, by providing the inner surface of the layer of the patch which contacts with the inner tube, with a semi-cured Surface that will, within a few minutes of its application to the tire, owing to its semicured surface, etfectually seal the marginal edges of the patch-to the tire shoe, positively preventing any of the uncured gum on the intermediatelayers of the patch from oozing out onto the periphery of the outermost layer, thereby preventing any of the gum from coming into contact with the in-` ner tube.

Another object is to provide a patch that is easy to apply and will allowthe tire to be used within a few minutes after application. The last named characteristic obviates. the necessity of Waiting for the mended parts to dry or delays caused by the vulcanization process.

These and other objects are accomplished by the novel construction` and arrangement of parts hereinafter described and illustrated in the accompanying drawing, in

10 which Figure 1 .is a top plan view of the pre'- ferred embodiment of the. device, the cover being partially removed to show the construction.

Figure 2 is a longitudinal sectional view 0f the device with the cover thereon.

.Figure 3 is a sectional view thereof, showing an application of the device to a tire shoe.

Referring more in detail to the drawing, the preferred shape, as indicated, is oval as best suited to engage with the tire shoe, and is applied on the inner surface over a puncture, blow-out or like openingjj The device consists of a layer'1-0 cut from a sheet 0f substantially pure gum, the back surface 11 of which has b een cured, while the front surface 12 has been only par/- tially cured to present a tacky, strongly ade hesive face.

Centrally disposed on kthe vface-12 is a layer 13, of lesser area to present a substantiallyfuniform margin therearound and a third layer 14: of decreased area is arranged centrally on the second orintermediate layer 13. f

T he layers 13 and 14 are preferably made from a sheet of heavy woven textile fabric, as duck or canvas and are secured in relative relationby rubber cement to cause adherence, the lower layer 13 being further lconfined by the soft tenacious face of the base layer 10.

A block 15 ofuncured gum is caused to adhere to the upper: layer 14 ina similar manner, thisblock being much less in area thany the layer on Which it is superposed and is cut from a sheet previously partially cured on its lower surface 16 to impart a certain degree of stability, the main portion of the block being what is technically known as five minute stock.

T he block 15 and several' layers are pressed together to form a unit, the exposed upper surfaces of which are protected While in .storage or transit by a thin muslin cover 17 lightly laid over the sticky surfaces,

The number oflayers in the patch may be increased or. diminished i'n accordance. with the duty the patch is to perform; obviously a heavy truck tire requiring additional layers.

In operation, the covery 17 is' strippedof the patch, the tire removed .and the inner tube taken outof the shoe.

The edges of the lpuncture are cleanedfrom dirt an'd'also the inner marginal surfaces' rendered fairly clean. The patch is applied from within the shoe, with the block 15 directly over the puncture, and pressed 100 firmly in place. f

The inner tube isreinserted and filled as usual withl compressed air, forcing the gum to flow into the opening, filling the space and covering 'its margin, as shown in 105 Figure'3, in which'the numeral 18 designatesvthe tire shoe.

Due to the tenacious adherence of the margin 12, iiow of the gum block 15 is prevented beyond the contour of the patch,

the tube.

The c'anvas/ layers operate to prevent the patch from being forcedltoo far-.into the l opening,`acting as a reenforcement, andydue to the strength of the fibres of Which'they are composed, prevent tearing or cracking of the patch. y .A

Although the foregoing is` descriptive ot the preferred embodiment of the invention, it will be apparent that minor changes :nay

be made in its construction, Without the ex ercise of invention or conflicting with the scope of the claims hereto appended.

Having thus described my invention,

what I claim as new and desire to secure by Letters Patent, is

1. A repair patch comprising a plurality of oval layers progressively *decreasing in area, said layers-beingjcel'nented together, the top layer of said patch being cured on one side and semi-cured on the other to adhere to the surface surrounding the marginal edge of a rupture, said semi-cured side of the toplayer of the patch being vulcan' izable by heat engendered by use of the tire.

2. A-repair patch comprising a plurality of oval layers progressively decreasing in area, said layers being cemented together, a cured gum block on the smallest of said layers, vulcanizable in half the timeof the semi-cured surface of the top layer.

3. A repair patch comprising an outer layer of rubber cured on its outer surfacer and partially cured on' its inner surface, layers of canvas progressively decreasing in area cemented to the outer layer, and a block of rubber on the inner layer of canvas and partially cured on its attached surface,` sa1d outer layer having an adhesive margm adapted to prevent flowing of said block .therebeyond when under pressure.

.Y 4. A repair patch comprising aplurality of thin untreated oval canvas sheets, each progressively decreased in area,l a backing sheet of larger area than the above mentioned sheets secured to s aid sheets, the back, surface of which has bencured into a sheet of rubber and the front surface of Which has been semi-cured, and a layer of relativelyv pure 4unvulcanized''gum block provided with a semi-cured back surface capable of being vulcanized in approximately tive minutes, said block being of lesser area than the smaller of said sheets to which it is applied.

This specificati-on signe-d and witnessedy this 21st day of Decemberlr1925. L 

